Following last night's harrowing tragedy in Paris, the city's people are gathering in solidarity to pay respects and mourn the lives lost—which authorities are reporting is at least 129 deaths, with more injured.

This morning, at a memorial scene near the Bataclan concert hall where one of the attacks occurred, a pianist set up a portable piano and played a cover of John Lennon's iconic song, "Imagine" for the grieving crowd. See more from the moving tribute below: